1/2" UNF HSS Taper Tap Sutton

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For producing precision threads by hand tapping, for starting threads - either second or bottoming taps should used after to achieve desire thread depth. General purpose use Suitable for materials up to 1000N/mm2 Through & blind holes Suitable for both hand and machine operations Threads per inch 20 Overall length 89mm Cutting length 29mm Drill diameter 11.5mm